IQC & PCBA
Incoming components and board-level function are checked before assembly.
Smart lock quality assurance
Quality Control Built Into Every Smart Lock Order
YOUNUO IET controls incoming components, PCBA performance, mechanical assembly, lock functions, aging and final shipment release through one documented manufacturing workflow.
Assembly & function
Mechanical fit, access methods, motor behavior and alarms are verified.
OQC & release
Appearance, accessories, packaging and shipment records receive final review.
Quality vision & objectives
7-Stage Quality Control From IQC To Pre-Shipment Release
Measurable targets and defined inspection gates connect incoming quality, in-process control, finished-product validation and export release.
Quality vision
The quality principle is zero major safety incidents, consistent product reliability and professional service for long-term overseas cooperation.
Incoming non-conformity ≤ 0.8%
Key components including fingerprint module, lock motor, main PCB and lithium-ion battery target 100% pass rate.
FPY ≥ 98.5%
In-process production control targets ≤ 1.2% rework rate.
Delivery pass rate ≥ 99.7%
Finished-goods batch rejection target ≤ 0.3%.
Annual failure rate ≤ 1.5%
Zero major safety-related complaints per year.
Motor life >= 150,000 cycles
Fingerprint FAR <= 0.001%, FRR <= 1%, with sampled IP, temperature and salt-spray testing.
ISO 9001 system maintained
Product- and market-specific certificates or test reports are reviewed only when matched to the exact model and approved document.
Incoming Material Inspection
Review lock bodies, panels, electronic components, accessories and surface finish before assembly.
PCBA Inspection
Check board function, power behavior, communication modules and electronic checkpoints before installation.
Assembly Inspection
Verify mechanical fit, electronic integration, lock-body assembly and fastener control.
Function Testing
Check biometrics, card/PIN, app connection, motor behavior, alarms and model-specific functions.
Aging Testing
Run selected products through repeated-operation and powered aging checks before packing.
Appearance Inspection
Review finish, panel, keypad, handle, housing and buyer-facing presentation.
Final Packing & OQC
Confirm labels, accessories, manuals, protection, quantity and buyer-specific packing requirements.
Real testing evidence
Factory Tests Buyers Can Review
Approved factory footage shows how mechanical durability, finished-lock functions and PCBA moisture protection are handled on the production floor.
01
Lock Body Life-Cycle Test
Repeated mechanical operation validates lock-body movement and durability.
02
Finished Lock Function Inspection
Access methods, motor response, indicators and alarms are checked before release.
03
PCBA Conformal Coating
Moisture-protection coating is applied as a controlled board-level process.
Verified quality system
ISO 9001:2015 Quality Management System
Review the current certificate holder, certified scope, certificate number and validity before supplier qualification.
Verified document · Valid through 7 May 2029
Quality Management System Certificate
- Certificate holder
- SHENZHEN YOUNUO IET CO., LTD
- Standard
- GB/T19001-2016 / ISO 9001:2015
- Certificate number
- 52726Q00019R100
- Issued date
- 8 May 2026
Certified scope
R&D and manufacturing of smart home electronic appliances (smart door locks and smart curtains), embedded fingerprint recognition modules and camera modules.
This quality-management certificate describes the organization and certified scope. Product-specific market certificates and test reports are reviewed separately by model and destination market.
Buyer QA deliverables
Quality Evidence For Supplier Qualification
Qualified projects can align regional test standards, audit requirements, inspection records and corrective-action responsibilities before mass production.
Request QA DocumentsCustomized testing standards for EU, USA, Brazil, Middle East and other regional markets.
Third-party factory audits are supported for qualified B2B cooperation projects.
Production-caused defects are handled through rework, replacement and related logistics responsibility.
Monthly quality reports can be provided for transparent data tracking and continuous improvement.
Documented warranty responsibility
2-year complete-lock warranty and 3-year warranty for core functional components.
Quality review
Define Your Quality Requirements Before Sampling
Send the target model, destination market, required certification, test standard and inspection plan for engineering and QA review.